When choosing a violinist you have the option of acoustic or an electric violin. Both options provide a beautiful sound. With an electric violin you get an instrument that sounds a little edgier, like you would hear in a piece of rock music.
All violinists can perform on both instruments: electric and acoustic. Here is an example of a classical piece of music performed on an electric violin. Listen to the sound output.
Csardas performed on the electric violin
You can hear that it's a classical piece of music, the electric violin gives it more of an edge.
The following video is the more traditional sound achieved on an acoustic violin; combined here as a duo with a pianist.